Jonghyun likes Shin Se Kyung and ends up dating her. Taemin does not understand why Jonghyun-hyung would choose Se Kyung-noona over his Key-umma. He thinks Key-umma is better. Will Taemin be able to make Jonghyun realize that Key is better? What about Taemin? Will he only be able to make his Key-umma happy? 

Jonghyun brings a certain someone home for dinner. Taemin is upset and decides to confront his hyung.   Key-Umma is Better (First) Key-Umma, You're Better Than Her (Second)

SEQUEL to Key-Umma is better :]  Shin Se Kyung is suffering because of antis. Jonghyun comforts her over the phone, and Taemin realizes he's not the only one who overheard their conversation. Key proves he is better, but suffers because of it.  Key-Umma is Better (prequel to Key-Umma, You're Better Than Her)

Jonghyun is dating Shin Se Kyung and Taemin does not understand why because he thinks Key-umma is better.   Key-Umma, You're Better Than Her (sequel to Key-Umma is Better) I Think Key-Umma is Better! (sequel to Key-Umma, You're Better Than Her)

Key wonders what to get Jonghyun for their anniversary. 

Onew walks in on Taemin doing his homework. He is bored. Also, it doesn't take much to distract his adorable magnae :]   A cute OnTae moment :]